In order to ensure the normal operation of the car, it will be equipped with more than 70 electronic controllers for its subsystems, in addition to common engine controllers, there are transmissions, airbags, anti-lock brakes/ABS, cruise control, power steering wheel, audio system, power windows, doors, mirror adjustment, battery and hybrid electric vehicle charging system, etc., which have independent subsystems, there is a need to communicate with other subsystems, which requires the use of the controller local area network to link the different subsystems together, the use of CAN bus protocol can be realized through software, safe, cost-effective, using the CAN bus. There are independent sub-systems and sub-systems that need to communicate with other sub-systems, which requires the use of a controller local area network to link the different sub-systems together, and the use of CAN bus can be realized through software, which is safe to use, low cost, and easy to operate.

Specific use of CAN bus protocol in automobile

CANbus analyzer

CANbus analyzer

1、Automatic start/stop system: Different signals from sensors in different locations of the vehicle: speed sensor, steering angle, air conditioning off, engine temperature, etc. can be collected by CAN bus and used to decide whether the engine can be turned off when stopping the vehicle, thus improving fuel efficiency and exhaust emissions.

Automotive Diagnostic Analyzer Tools

2、Electronic Parking Brake System: The ramp parking function requires the vehicle’s tilt sensor and the road’s speed sensor to transmit sampling signals over the CAN bus to decide whether the vehicle is parked on the ramp. Similarly, the sensors for the seat belts (part of the airbags) transmit signals via the CAN bus to determine whether the seat belts are successfully fitted, and the parking brake is automatically switched off when moving.
Note: The tilt sensor is also used for the anti-theft alarm; the speed sensor is also used for anti-lock braking, engine control and traction control

Automotive Diagnostic Analyzer Tools

3, Parking Assist System: When the car is switched to reverse gear, the transmission control unit sends a signal through the CAN bus to activate the parking sensor system and the door control system, so that the passenger-side mirrors are tilted downward to show the road conditions. The CAN bus can also get a signal from the rain sensor to automatically trigger the rear windshield wiper when reversing.

Automotive Diagnostic Analyzer Tools

4. Lane departure warning/collision avoidance system: Lane departure warning/parking sensor signals are used via CAN bus for the driver assistance system to determine nearby objects. These signals can trigger the e-brake system in the collision avoidance system via CAN bus.
5, the car brake cleaning system: rain sensor through the CAN bus will send the signal to the anti-lock braking system module, in driving slightly triggered once the human body will not notice the brakes to clear the brake pads on the liquid.

In order to make the CAN bus function in the automotive field to get more convenient application, reduce the CAN bus wiring and set up the degree of difficulty, GCAN brand special research on the CAN bus related content, and the development of a special diagnostic, analysis tools for CAN bus data, USBCAN bus analyzer, compact size, plug-and-play, wiring is simple to reduce the use of copper wire at the same time to reduce costs! If you are interested in GCAN CANbus analyzer, please contact us! We will provide you with professional equipment and solutions.